Download Boca HOME OFFICE User`s guide

1
HOME OFFICE MODEM
33.6
Internal/External Fax Modem
Advanced User’s Guide
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HOME/OFFICE MODEM
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Before You Begin your Installation
The product you have purchased is designed to be
easily installed into most IBM PC or compatible
systems. Many products have large, easy-to-read
legends to allow for the easy configuring of the
product. This installation manual contains detailed
instructions. Most included software has automatic
installation programs to place the software correctly onto your
computer. However, as all computers are configured differently, you
may be required to perform some basic DOS or Windows tasks. If you
are not familiar with basic DOS commands such as DIR, CD, or EDIT,
you should check your DOS manual, or seek assistance from you
local computer dealer to install the product.
How to get Technical Assistance
The dealer that you purchased this product or your computer from is
the first place you should go for technical assistance. The dealer is
usually the most qualified source of help, and
is most familiar with your system and how
this product should be installed. Many dealers
have customer service and technical support
programs, with varying levels of support
offered, depending on your needs and computer knowledge. Please
contact the dealer first whenever a problem occurs. International
customers will find that contacting the place of purchase for
assistance will be much more efficient than contacting Boca
Reserach directly.
If your Dealer Can’t Assist you
If you can’t get assistance from your dealer, the manufacturer
provides varying levels of technical assistance as summarized on the
following page. All phone numbers are based in the United States.
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Boca BBS
561-241-1601
1
4
7
8
2
5
3
6
9
Automated
Fax Retrieval
System
561-995-9456
Standard Free
Technical Support
561-241-8088
Priority Service
900-555-4900
($2 per minute)
The Standard Free Technical
Support number is for
On-Line Support!
quick answers to specific
CompuServe: GO BOCA
inquiries on product
Internet:
features and technical
email: [email protected]
questions (call 561-241-8088;
on the World-wide WEB:
M-F, 8 am to 6:30 pm EST).
http://www.bocaresearch.com
Direct access to technical
support representatives is
provided on a limited basis.
If you require immediate
attention or in-depth help
with the installation of the
product, please call our 900-priority support number for service. This
number gives you immediate access to senior-level technicians. The
number is 900-555-4900. You will be charged $2.00 per minute. The
charges will appear on your next phone bill.
Damaged or Missing Items
We use many world-class quality assurance programs to ensure the
product you purchased is of the highest caliber. Sometimes, however,
a component may be missing from the box, or is damaged or corrupt
in some way. If this happens, immediately return the entire package
to your place of purchase so you may exchange it for a new one. Your
dealer should be able to provide you with an exchange far more
quickly than by contacting us directly. If for some reason you are
unable to return the product directly to its place of purchase, refer to
the “Servicing Your Product” and “Warranty” sections in this manual
for instructions.
HOME/OFFICE MODEM
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Using the Boca Research HOME/OFFICE MODEM manual.
This manual provides installation and operating instructions for the
Boca HOME/OFFICE MODEM. The manual assumes the user has basic
computer skills and is familiar with personal computers. Its primary
purpose is to provide physical installation instructions and basic
troubleshooting. All sections should be read carefully before
beginning any installation procedures. Our customer support
experience has shown that many costly and time-consuming calls to
our technical support staff can be avoided with closer attention to the
information provided here. In addition to following the instructions
provided in this manual, you will also need to consult the
documentation supplied with your communications software.
IMPORTANT NOTICE
FCC Requirements
The Federal Communications Commission (FCC) restricts the way
you can use modems. Read the FCC compliance statement found in
Appendix B of this manual.
Connecting the Modem
You can connect the modem to various types of telephone jacks. The
acceptable phone jack types are RJ-11, RJ-12, RJ-13, RJ-41S, and RJ45S. Most homes and businesses use one of these jacks. If your
phone system does not have a modular jack, you can purchase an
adapter to convert your jack into an RJ-11C jack. Adapters may be
purchased from any local phone or electronics store.
Copyright
©1996 Boca Research, Inc. All rights reserved. No reproduction of this
document in any form is allowed without permission in writing from Boca
Research, Inc. Boca Research is not liable for any damage resulting from
technical or editorial errors or omissions contained in this document. The
information in this manual is subject to change without notice. Revisions to the
product(s) in this manual may occur at any time without notice.
Trademarks
All Boca Research products are trademarks of Boca Research, Inc. All other
references to computer systems, software, and peripherals use trademarks
owned by their respective manufacturers.
Publication Date: December, 1996
Printed in the U.S.A.
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Contents
Section One: Introduction ............................................ 7
Section Two: Package Contents .................................. 9
Section Three: External Modem Requirements and
Status Indicators ..................................................... 11
Section Four: Internal Modem: Advanced
Configuration for Windows 95 ........................... 13
Section Five: Troubleshooting .................................. 14
Appendix A: Technical Specifications .................... 19
Appendix B: Compliance Information .................... 20
Appendix C: Modem Command Reference ........... 27
Basic AT Commands ............................................... 31
Extended AT Commands ....................................... 35
MNP Operation ........................................................ 38
AT Commands for V.42/V.42bis .......................... 41
AT+MS (Modulation Select) ................................. 43
S-Registers ................................................................. 48
Result Codes .............................................................. 53
Appendix D: Servicing Your Product ...................... 58
Appendix E: Warranty Information ......................... 61
Glossary ........................................................................... 62
HOME/OFFICE MODEM
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Section One: Introduction
The V.34 protocol offers the newest technology allowing
faster and more reliable connections between modems.
The Boca HOME/OFFICE MODEM is based on the Rockwell
chip set. This modem supports the highest possible
speeds today.
Features
n
Highest supported data transmission rates by the V.34
(33.6Kbps) standard; 14.4Kbps send/receive fax.
n
100% compatible with the Hayes ‘AT’ command set.
n
Auto-dial and auto-answer; tone or pulse dialing.
n
Group III send and receive fax capability with support
for Class 1 and Class 2 fax commands.
n
Communication ports selectable as COM1, 2, 3, or 4
using interrupts 3, 4, 5, or 7 (INTERNAL ONLY).
n
DTE speed up to 115.2Kbps, 16550 UART interface
(internal), serial CCITT V.24 (EIA/RS-232-D) (external).
n
Supports V.42/MNP2-4 error control and V.42bis/
MNP5 data compression for throughput up to
115.2Kbps
Introduction
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Installation Hints
Your HOME/OFFICE MODEM has been pre-set at the factory
for optimum performance. All defaults are set to allow the
modem to negotiate the best possible connection with
highest quality, data compression, and error correction.
Because of these factory defaults, the suggested
initialization (INIT) string is: ATZ.
If you want to custom configure your stored profiles, we
suggest that you always start out with an
AT&F&C1&D2 before customizing other commands. This
string will reset the modem to the factory defaults as well
as reset some other basic settings.
Notes on Performance
To get optimum performance from your HOME/OFFICE
MODEM, the phone line quality over which you are
transmitting and receiving must be reliable and relatively
free of “noise”.
HOME/OFFICE MODEM
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Section Two: Package Contents
This section explains how to connect the Boca Research
HOME/OFFICE MODEM to your computer.
External Modem
Verify that your external modem package contains the
following items:
AC POWER
ADAPTER
EXTERNAL
MODEM
12
12
RJ-11 CABLE
ADVANCED
USERS GUIDE
12
12
COMMUNICATIONS
SOFTWARE & MANUAL
(Phone cable configuration will vary for international settings.)
If any items are missing or damaged, contact the vendor
from whom you purchased the modem for assistance.
Package Contents
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Internal Modem
Verify that your internal modem package contains the
following items:
INTERNAL
HOME/O FFICE
MODEM
COMMUNICATIONS
ADVANCED
SOFTWARE & MANUAL USERS GUIDE
12
12
11
RJ-11 CABLE
(Phone cable configuration will vary for international settings.)
If any items are missing or damaged, contact the vendor
from whom you purchased the modem for assistance
HOME/OFFICE MODEM
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Section Three: External Modem
Requirements and Status Indicators
The external version of the HOME/OFFICE MODEM has few
requirements and is easy to use. Be sure to read the
information in the Appendix about connecting to the phone
company. In addition, note the following:
n The communication settings are controlled by the
software that manipulates the serial interface present in
your system. The external modem is connected to that
interface.
n Operating the HOME/OFFICE MODEM with a computer
requires communication software, either as a stand-alone
product as included here, or as part of an application
program.
n The HOME/OFFICE MODEM takes a DB-25 (25-pin male
connector), but computer equipment varies. Check the
serial ports at the rear of your system.
n The HOME/OFFICE MODEM uses an existing serial port (9or 25-pin connector) on the back panel of your computer.
You will need a 25-pin serial cable (available at most
computer retailers) to attach to the RS-232 serial port
connector on the back of the modem.
See the following page for a summary of the modem’s status
indicators.
External Modem
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Status Indicators
Indicator
Definition
Status
TM
Test Mode
FLASHES when modem is in
test mode and if any errors are
detected.
AA
Auto Answer
ON when in Auto Answer mode
and when online with the host
modem.
HS
High speed
ON when the modem is
powered on or communicating
with another modem at
4800bps or faster.
OH
Off Hook
ON when the modem
takes control of the telephone
line to establish a data link.
SD
Send Data
FLASHES when a data bit is
sent to the modem by
the computer.
RD
Received
Data
FLASHES when a data bit is
received from the phone line,
or when the modem sends
result codes to the computer.
TR
Terminal
Ready
ON when the modem receives
a data terminal ready signal
from the computer via the RS232 cable.
CD
Carrier
Detect
ON when the modem receives
a valid data signal (carrier)
from a remote modem. Ready
for data transmission.
HOME/OFFICE MODEM
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Section Four: Internal Modem: Advanced
Configuration for Windows 95
The Internal Boca Modem you have just purchased is an 8bit modem that can use IRQs 3, 4, 5, or 7. If you are
reading this section, it is probably because Windows 95
has already assigned all of the above-mentioned IRQs to
other devices in your system.
In order for you to complete installation of the modem,
you must first make one of the IRQs in the group 3, 4, 5,
and 7 available.
If you have an I/O card that may be using one of these
resources for an extra Printer Port, for example, you can
disable the extra printer port on the I/O card and make
that IRQ available for your new Home Office Modem.
Another option would be to change the IRQ setting on
any 16-bit device (e.g., sound card) you may be using.
These 16-bit devices may be using your system’s lower
IRQs, but are capable of addressing higher IRQs such as
IRQ9, 10, 11. For instructions on how to accomplish this,
please refer to the manual that came with your peripheral,
or call the technical support number for that product.
Explain that you are trying to change the IRQ setting on
your device in order to free up a resource for a modem.
Advanced Configuration
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Section Five: Troubleshooting
This section lists common problems that may be
encountered and their possible solutions.
SYMPTOM
No dial tone.
Modem will not
connect to
another modem.
No response
when you type
in AT commands
POSSIBLE REMEDY
n
Verify that you have cables
plugged in correctly.
n
Connect a telephone set directly to
the wall jack and check for a dial
tone. If no dial tone is heard, the
telephone line is not working.
Contact the telephone company.
n
Check the connections between the
modem and the computer, and the
modem and the telephone line.
n
Make sure the telephone jack is
operational as described above.
n
The telephone line may be in use
at a different extension.
n
Perhaps the number you have
called does not reach a modem, or
the remote modem may not be set
up to respond.
n
There may be a conflicting port
address. Re-configure the modem’s
COM port address (INTERNAL
MODEL ONLY).
HOME/OFFICE MODEM
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SYMPTOM
No response
when you type
in AT
commands
(contd)
POSSIBLE REMEDY
n Verify that the communication software
is set to the same communications port
where your modem is attached (e.g.,
COM1, COM2). Check IRQ settings in
your software and on the modem.
n
Check your serial cable connection
(EXTERNAL MODEL ONLY).
n
Try typing AT&F to reset the modem
to its factory defaults.
n
Move the modem to another serial
port (power down the host computer
first). If the modem works after being
moved, it’s likely the problem is not
with the modem.
AT commands
not visible.
n
Make sure the echo command is set to
ON. Change to echo with the ATE1
command.
After data
connection is
established,
data is
displayed as
garbled
characters.
n
Make sure the local (yours) and
remote modem configurations are
compatible.
n
Turn off your modem (EXTERNAL),
exit, and re-run your communication
software.
n
Verify that both modems are operating
with the same settings, speed, data,
parity, and stop bits.
n
The software may not be set for correct
terminal emulation. Configure software
to correct type. ANSI terminal
emulation is most commonly used.
Troubleshooting
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SYMPTOM
POSSIBLE REMEDY
Garbled characters
(contd)
The modem does
not answer an
incoming call.
Modem
disconnects while
on-line.
n
Power down your system
(INTERNAL) and re-run your
communications software. Check
software settings.
n
Exit the communications
program and restart it.
n
You may not have enabled autoanswer. Use your software to
enable this function.
n
If you have an answering
machine, it may be answering
before the modem can. Turn the
answering machine off, or, use the
software to set auto-answer to
respond in fewer rings than the
answering machine.
n
Check for any loose connections.
n
Re-try the connection by dialing
the number several times. You
may be experiencing line
interference.
n
An incoming call may have
broken the connection if a callwaiting feature was enabled.
Disable call-waiting and try again.
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SYMPTOM
POSSIBLE REMEDY
I am having trouble
getting my init
string to work.
n
Init strings are primarily
personal preferences. Use the
most basic one that can get the
job done. See Installation Hints
on page 8. An &Q6 (which
disables error control) is optional.
Connection Errors
n
Try connecting at a lower speed
(e.g., 9600 or 2400bps).
n
Turn off error correction/
compression with an AT&Q6%C0
command.
n
Noisy/poor line conditions may
prohibit connection. Have your
phone company test your lines.
n
Verify that the modem at the
other end is up to date and
compliant with current CCITT
and Bell standards.
Troubleshooting
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SYMPTOM
POSSIBLE REMEDY
Problem
Connecting to Online subscription
services.
n
Some on-line services require that
your modem be configured to run
with error correction and data
compression turned OFF. The
easiest way to accomplish this is by
using the command AT&Q6 and
setting the communication software
to the correct baud rate for the
service you are calling (e.g., 2400,
9600bps). If you still have problems
connecting, try forcing the modem
to connect up at the slower speed
with the commands
AT&Q6N0S37=6 for 2400 baud, and
AT&Q6N0S37=9 for 9600 baud
services.
Download
terminates
abnormally.
n
Make sure the AT&R1 is set in
your active profile.
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Appendix A: Technical Specifications
Modem Data Rate:
33.6K, 28.8K, 26.4K, 24K 21.6K, 19.2K,
16.8K, 14.4K, 12K, 9600, 7200, 4800, 2400,
1200, or 300bps
Fax Data Rate:
14.4K, 12K, 9600, 7200, 4800, 2400bps
Protocol Compatibility:
CCITT:
(ITU-TSS)
CCITT: V.34 (33.6Kbps),
V.32bis (14.4Kbps), V.32
(9600bps), V.42, V.22 (2400bps),
V.21 (1200bps)
Bell:
Bell 212A (1200bps), Bell 103
(300bps)
Rockwell:
V.FC
Fax Modulation Protocols
V.17
V.29
V.27
V.21
(14.4Kbps) transmit and receive
(9600/7200bps) transmit and receive
ter (4800/2400bps) transmit and receive
channel 2 (300bps) transmit and receive
V.42/MNP2-4 and V.42bis/MNP5 support
LED Status
Indicators:
(EXTERNAL)
Diagnostics:
TM, AA, HS, OH, SD, RD, TR, CD
n
n
Local/remote digital and analog loopback.
Automatic power-on self-test.
Dimensions:
EXTERNAL: 7 1/4" x 5 3/8" x 1 1/4"
INTERNAL: 4 1/4" x 4 1/8"
Technical Specifications
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Appendix B: Compliance Information
FCC Statement:
“This device complies with part 15 of the FCC rules. Operation is
subject to the following two conditions:
(1) This device may not cause harmful interference.
(2) This device must accept any interference received including
interference that may cause undesired operation.
THIS UNIT COMPLIES WITH FCC PART 68 AS OF DATE OF
MANUFACTURE.
This equipment has been tested and found to comply with the limits
for a Class B digital device, pursuant to Part 15 of FCC rules. These
limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates,
uses, and can radiate radio frequency energy and, if not installed in
accordance with the instructions, may cause harmful interference to
radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or
more of the following measures:
• Re-orient or relocate the receiving antennae.
• Increase the separation between the equipment and the receiver.
• Connect the equipment into an outlet on a circuit different from that
to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Note: This unit was tested with shielded cables on the peripheral
devices. Shielded cables must be used with the unit to insure
compliance.
Note: The manufacturer is not responsible for any radio or TV
interference caused by unauthorized modifications to this equipment.
Such modifications could void the user ’s authority to operate the
equipment.”
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Notification to the Telephone Company
Notification to the telephone company is no longer required prior to
connecting the registered equipment but upon request from the
telephone company the user shall tell the telephone company which
line the equipment is connected to as well as the registration number
and the ringer equivalence of the registered protective circuitry. In
most, but not all areas, the sum of all RENs should be 5.0 or less. The
FCC Registration number and Ringer Equivalence number are printed
on the main chip in the center of the internal modem board, or on the
underside of the external modem.
Malfunction of the Equipment
In the event that the MODEM should fail to operate properly, the
customer shall disconnect the equipment from the telephone line to
determine if it is the customer ’s equipment which is not working
properly, or if the problem is with the MODEM, the user shall
discontinue use until it is repaired. In the event service is needed the
user should contact the vendor from whom you purchased the
MODEM.
Telephone Connection Requirements
Except for telephone company-provided ringers, all connections to
the telephone network shall be made through standard plugs and
standard telephone company-provided jacks, or equivalent, in such a
manner as to allow for easy and immediate disconnection of the
terminal equipment. Standard jacks shall also be arranged that, if the
plug connected thereto is withdrawn, no interference to the operation
of the equipment at the customer ’s premises which remains
connected to the telephone network, shall occur by reason of such
withdrawal.
Incidence of Harm
Should terminal equipment or protective circuitry cause harm to the
telephone network, the telephone company shall, where practical,
notify the customer that temporary discontinuance of service may be
required; however, where prior notices are not practical, the telephone
company may temporarily discontinue service if such action is
deemed reasonable in the circumstances. In the case of such
temporary discontinuance, the telephone company shall promptly
notify customers and will be given the right to bring a complaint to
the FCC if they feel the disconnection is not warranted.
Compliance Information
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Changes in Telephone Company Equipment or
Facilities
The telephone company may make changes in its communications
facilities, equipment, operations, or procedures, where such action is
reasonably required and proper in its business. Should any such
changes render the customer ’s terminal equipment incompatible with
the telephone company facilities, the customer shall be given
adequate notice to make modifications to maintain uninterrupted
service.
General
The FCC prohibits customer-provided terminal equipment be
connected to party lines or to be used in conjunction with coin
telephone service.
Installation
The MODEM is equipped with a USOC RJ-11 standard miniature
modular jack and is designed to plug directly into a modular jack.
DOC Compliance Statement (Canada)
The Canadian Department of Communications label identifies
certified equipment. This certification means that the equipment
meets certain telecommunications network protective operational and
safety requirements. The Department does not guarantee the
equipment will operate to the user ’s satisfaction.
Before installing this equipment, users should ensure that it is
permissible to be connected to the facilities of the local
telecommunications company. The equipment must also be installed
using an acceptable method of connection. In some cases, the
company’s inside wiring associated with a single line individual
service may be extended by means of a certified connector assembly
(telephone extension cord). The customer should be aware that
compliance with the above conditions may not prevent degradation
of service in some situations.
Repairs to certified equipment should be made by an authorized
Canadian maintenance facility designated by the supplier. Any repairs
or alterations made by the user to this equipment, or equipment
HOME/OFFICE MODEM
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malfunction, may give the telecommunications company cause to
request the user to disconnect the equipment.
Users should ensure, for their own protection, that the electrical
ground connections of the power utility, telephone lines, and internal
metallic water pipe system, if present, are connected together. This
precaution may be particularly important in rural areas.
CAUTION Users should not attempt to make such connections
themselves, but should contact the appropriate electric inspection
authority or electrician, as appropriate.
The Load Number (LN) assigned to each terminal device denotes the
percentage of the total load to be connected to a telephone loop which
is used by the device to prevent overloading. The termination on a
loop may consist of any combination of devices subject only to the
requirement that the total of the load numbers of all the devices does
not exceed 100. The Load number appears on the underside of the
HOME/OFFICE MODEM.
To be installed in UL-listed and CSA-certified computers
with instructions on how to add/remove expansion cards.
The RAL number of this equipment is 0.7. This number denotes the number of
items that may be attached to a telephone line. The sum of all the items
connected to a line should not exceeed a sum of 5.
This device is not intended to be used in parallel with other devices. The
operation of this equipment on the same lines as telephones or other equipment
with audible warning devices or automatic ring detectors may give rise to bell
tinkle or noise and may cause trupping of the ring detector. The user should not
report such occurrences as faults.
When relocating the equipment, always disconnect the telecomm line connection
before the power, and reconnect the power first.
NOTE THAT FAILURE TO MEET THE ABOVE REQUIREMENTS MAY
NEGATE THE USER RIGHTS UNDER THE TELECOMM TERMS OF SERVICE
Compliance Information
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DECLARATION OF CONFORMITY
(In accordance with EN 45014)
We,
Boca Research, Inc.
1377 Clint Moore Road
Boca Raton, FL 33487
declare under our sole responsibility that the product,
Type of Equipment: Optical Modems
Model Numbers: ‘MV.34XXI, MV.34XXE’, ‘MV.34CXXE’
to which this declaration relates is in conformity with the following
standards or other normative documents:
Safety: The Product complies with the requirements of the low voltage
directive 73/23/EEC, EN 60950 (1992), A1 & A2
EMC:
EN 55022 (1993) Class B
EN 50082-1 (1992)
IEC 801-2 (1991), 4kV CD; 8kV AD
IEC 801-3 (1984), 3 V/m
IEC 801-4 (1988), 0.5 kV Signal Lines,
1 kV AC Power Lines
following the provision of EMC directive 89/336/EEC
Boca Raton, Florida USA
Signature and Date: available on request
Typed Name and Title: available on request
European Contact:
Boca Research Holland
goudsesingel
3011 kd rotterdam
telefoon 010 213 45 71
telefax 010 213 29 99
HOME/OFFICE MODEM
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WARNING/ATTENTION
#1“CAUTION: THIS MODEM CARD IS INTENDED TO BE INSTALLED IN CSA
CERTIFIED EQUIPMENT IN THE FIELD BY THE USER IN THE MANUFACTURER’S
DEFINED OPERATOR ACCESS AREA. CHECK THE EQUIPMENT OPERATING/
INSTALLATION INSTRUCTIONS AND/OR EQUIPMENT MANUFACTURER TO
VERIFY/CONFIRM IF YOUR EQUIPMENT IS SUITABLE FOR USER-INSTALLED
APPLICATION CARDS.”
“ATTENTION: CETTE CARTE MODEM EST DESTINEE A ETRE INSTALLEE PAR
L’UTILISATEUR, SUR PLACE ET A L’INTERIEUR DE LA ZONE DEFINIE PAR LA
FABRICANT, DANS UN APPAREIL CERIFIE CSA. CONSULTER LE MODE D’EMPLOI
OU LE FABRICANT DE L’APPAREIL POUR VERIFIER OU CONFIRMER SI
L’UTILISATEUR PEUT Y INSTALLER LUI-MEME DES CARTES PERIPHERIQUES.”
#2“CAUTION: ALWAYS DISCONNECT MODEM BOARD (THE ONE WITH THE
TELEPHONE/PLUG JACK) FROM THE TELEPHONE SYSTEM WHEN INSTALLING
OR WHEN COVERS ARE REMOVED FROM THE HOST PRODUCT.”
“ATTENTION: TOUJOURS DEBRANCHER LA LIGNE TELEPHONIQUE DE LA CARTE
MODEM (MUNIE D’UNE PRISE OR D’UNE FICHE) AVANT DE PROCEDER A
L’INSTALLATION DANS L’APPAREIL OU LORSQUE LE COUVERCLE DE CELUI-CI
EST RETIRE.”
#3“CAUTION: APPLY THE ENCLOSED ADHESIVE WARNING LABEL TO THE
OUTSIDE OR INSIDE OF THE EQUIPMENT ENCLOSURE ADJACENT TO THE
MODEM CARD.”
“ATTENTION: APPOSER L’ETIQUETTE AUTOCOLLANTE DE MISE EN GARDE CIINCLUSE SURE LE PAROI EXTERIEURE OU INTERIEURE DU BOITIER DE
L’APPAREIL PRES DE LA CARTE MODEM.
CAUTION: Telecommunications voltages and currents can exceed the limits
of safety extra low voltage (SELV), resulting in personal injury. Do not touch
any components on the modem’s printed circuit board when power is applied,
or the telephone cable is plugged in.
Avoid installing, handling the telephone cable, or changing the jumper
settings on the modem during any weather activity where lightning strikes
may occur.
This unit is intended for installation in computing devices that are nonoperator accessible. Installation is to be performed by qualified service
personnel only
Compliance Information
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NOTES FOR USE OF THIS DEVICE IN NEW ZEALAND
• The grant of a Telepermit for a device in no way indicates Telecom acceptance of
responsibility for the correct operation of that device under all operating
conditions.
• This equipment shall not be used in any manner which could constitute a
nuisance to other Telecom customers.
• Some parameters required for compliance with Telecom’s PTC Specifications are
dependent on the [equipment connected to the RS 232 port (external)] /
[equipment within which this modem is installed (internal)]. The equipment shall
be set to operate within the following limits for compliance with Telecom
Specifications:
1. [Equipment connected to the RS 232 port (external)] / [equipment within which
this modem is installed (internal)] shall meet the requirements of the New
Zealand Electricity Act of 1993 and any associated Codes of Practice.
2. When the user manually initiates a call via [equipment connected to the RS 232
port (external)] /[equipment within which this modem is installed (internal)], the
equipment shall operate within the following restrictions:
a. Not more than 5 call attempts shall be made to the same number within a onehour period.
b. There shall be at least 60 seconds between call attempts.
c. Not more than a total of 10 call attempts shall be made to the same number
within a one-hour period.
d. Automatic calls to different numbers shall not be less than 5 seconds apart.
3. When used in the Auto Answer mode, the S0 Register must be set with a value
between 2 and 5. This ensures:
a. A person calling your modem will hear a short burst of ringing before the modem
answers. This confirms that the call has been successfully switched through the
network.
b. Caller identification information (which occurs between the first and second ring
cadences) is not destroyed.
4. This device is not intended to be used in parallel with other devices. The
operation of this equipment on the same lines as telephones or other equipment
with audible warning devices or automatic ring detectors may give rise to bell
tinkle or noise and may cause false tripping of the ring detector. The user should
not report such occurrences as faults.
5. When relocating the equipment, always disconnect the Telecom connection
before the power connection, and reconnect the power first.
NOTE THAT FAILURE TO MEET THE ABOVE REQUIREMENTS MAY
NEGATE THE USER RIGHTS UNDER THE TELECOM TERMS OF SERVICE.
HOME/OFFICE MODEM
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Appendix C: Modem Command Reference
In most cases, your communications software will set and
control the operation of your modem. Following is a brief
survey of the most commonly used Hayes-compatible AT
commands for use with your modem. In addition, we’ve also
provided information on extended AT command sets, SRegisters, and commands and registers for high-level
protocols such as MNP, V.42/V.42bis, and V.32/V.32bis.
It will rarely be necessary to use ‘AT’ commands and SRegisters in command mode. We include them here for more
advanced users who may prefer command mode operation,
or require special settings. See pages 31-57 for additional
details.
Hayes-compatible commands consist of a basic command set
and an extended command set. The basic set involves
functions such as dialing a number, or putting the modem
on-hook (i.e., replacing the telephone handset).
Extended commands allow more sophisticated control of the
modem such as transmission speed, or initiating high-level
functions like data compression or error correction. These
functions are defined and controlled by the available
protocols mentioned above. A protocol is a set of standards by
which data communications operate.
Every AT command includes an “AT” prefix, followed
immediately by the command and, in many cases, additional
parameters. Multiple commands can be entered at the same
time from your communications software.
AT Command[parameter) [parameter] ...
PRESS ENTER
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Example: ATH or ATH0 tells the modem to disconnect
Extended commands were developed to provide greater
functionality and control over modem operations. Their
format is the same as the basic command except that an
additional parameter is required following the AT prefix and
before the numerical parameter. This additional parameter
comes in three different forms:
the ampersand (&) character:
extended AT command
the backslash (\) character:
extended AT command for MNP
the percent (%) character:
extended AT command for V.42/V.42bis
Examples:
AT&K3 enables RTS/CTS (hardware-based) flow control. Flow control
compensates for the difference between the rate at which data reaches a device
and the rate at which the device processes and transmits.
AT\G1 enables flow control (software-based) (XON/XOFF) in MNP mode.
AT%E1 tells the modem to monitor line quality and request a “retrain”
(adjustment) to the connection.
S-Registers
Modem command “language” also employs a set of
indicators or registers, which are various numerical values
all with a standard “S” prefix, hence S-Registers. To a large
extent, the values defined in the S-Registers regulate the
operation of the modem and the function of some
commands in the AT command set.
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Example: S-Register 6, or S6=n, defines the length of time the
modem will wait for a dial tone. In this case the acceptable
range is 3-6 (in seconds) with a default value of 5. With S6=3,
the modem will wait three seconds for a dial tone when
going off-hook before dialing the first digit of its telephone
number.
Data Communication Protocols
This can be more than a little confusing. These protocols
represent various domestic and international standards
which enhance modem performance and reliability. The
protocols are activated and controlled by a variety of
extended AT commands and S-Registers.
MNP stands for Microcom Networking Protocol and is a
protocol developed by Microcom for full-duplex, error-free
communications. This protocol detects and corrects errors
which can result from telephone line noise and other signal
distortions. There are several classes of MNP operation also
referred to as service classes. Class 5 maximizes data transfer
rate and provides compression which can significantly
increase data throughput.
The “V-Dot” standards are more numerous, but have a
single origin: the International Telecommunications Union
Telecommunications Standards Sector (formerly the
Consulting Committee for International and Telephone and
Telegraph or CCITT). Some of the lower-level standards such
as V.21 and V.22 have “domestic” equivalents as developed
by the former Bell System, also referred to as Bell standards.
The “V.Dot” standards may be summarized as shown on the
following page.
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V.21
The CCITT standard for 300bps communications. Domestic
modems follow the Bell 103 standard, but V.21 can accept
international calls at 300bps.
V.22
The CCITT standard for 1200bps communications. The
domestic equivalent is the Bell 212A standard.
V.22bis The CCITT standard for 2400bps.
V.23
CCITT for 1200bps with a 75bps back channel. This is mostly
used in Europe and South America.
V.24
CCITT serial interface standard (EIA/RS232-D).
V.32
CCITT standard for 9600bps and 4800bps communications.
V.32bis CCITT standard for an extensive range of high-speed
modems operating at 14,400bps, 12Kbps, 9600bps, 7200bps,
and 4800bps.
V.42
CCITT standard for detection and negotiation for LAPM
(Link Access Procedure for Modems) error control. V.42 will
also support MNP levels 2-4.
V.42bis An extension of V.42 specifying the data compression
protocol for use with V.42.
V.FC
A Rockwell International-sponsored protocol. It can operate
up to 28,800bps for data
V.34
ITU-TSS protocol. It can operate up to 33,600bps for data.
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BASIC AT COMMANDS (default values are highlighted)
NOTE: AT command functionality may vary in international
settings. Command definitions listed in subsequent pages
reflect domestic (U.S.) functionality.
Command
AT
ATA
A/
Description
Attention characters
Answer command
Re-Execute last command
Dial Modifiers
Dial
ATD
Options
0-9
L
P*
T
W
,
@
!
;
^
S=n
Description
DTMF digits
Re-dial last number.
Pulse (rotary) dial. 10 pulses per
second.
Touch tone dial (DTMF).
Wait for dial tone for 1-255 seconds.
Default is 50 seconds (this value is set
by the S7 register).
(Comma) Pause for 0-255 seconds.
Default is 2 seconds (this value is set by
the S0 register.
Wait for quiet answer.
Initiate hook flash.
Return to command state after
dialing.
Disable calling tone.
Dial stored number. (See AT&Z). n=0-3.
*Not supported in Holland, Norway, Sweden, and Denmark
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Command
Description
Command Character Echo
ATE0
Disables echoing of the commands to the screen.
ATE1
Enables echoing of the commands to the screen.
(default)
Switch Hook Control
ATH0
Instructs modem to go on-hook.
ATH1
Instructs modem to go off-hook.
Identification
ATI0
Displays the product identification code.
ATI1
Displays the checksum.
ATI2
Displays ROM checksum as OK or ERROR.
ATI3
Displays the firmware revision level.
ATI4
Reports OEM-defined identifier string.
ATI5
Reports country code.
ATI6
Reports modem data pump model.
Speaker volume
ATL0
Low volume.
ATL1
Low volume. (default)
ATL2
Medium volume.
ATL3
High volume.
Speaker control
ATM0
Disables the modem speaker.
ATM1
Turns speaker on until carrier has been detected.
(default)
ATM2
Speaker is always on.
ATM3
Speaker is on when receiving carrier and during
dialing, but off during answering.
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Command
Description
Automode enable
ATN0
Requires speed of the connection be that specified
by the value of S37.
ATN1
Permits handshaking at any speed supported by
both modems. (default)
Return to on line state mode
ATO0
Switches the modem from command mode to online mode without dialing.
ATO1
Switches from command mode to on-line mode and
initiates an equalizer retrain sequence. d
Mode responses
ATQ0
Enables result codes to be issued to the screen.
(default)
ATQ1
Disables result codes to be issued to the screen.
Result code format
ATV0
Numeric format.
ATV1
Verbal format. (default)
Error correction message control
ATW0
Error correction call progress not reported.
(default)
ATW1
Call progress reported.
ATW2
Call progress not reported. Connect xxxx message
reports DCE speed (e.g., CONNECT 28800).
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Command
Description
Extended result codes
ATX0
Disables monitoring of busy tones unless forced
otherwise by country requirements; sends only OK,
CONNECT, RING, NO CARRIER, ERROR and NO
ANSWER result codes.
ATX1
Disables monitoring of busy tones unless forced
otherwise by country requirements; sends only OK,
CONNECT, RING, NO CARRIER, ERROR, NO
ANSWER and CONNECT XXXX result codes.
ATX2
Disables monitoring of busy tones unless forced
otherwise by country requirements; sends only OK,
TONE, NO ANSWER and CONNECT XXXX result
codes.
ATX3
Enables monitoring of busy tones; sends only OK,
CONNECT, RING, NO CARRIER, ERROR, NO
DIALTONE, NO ANSWER and CONNECT XXXX.
ATX4
Enables monitoring of busy tones and sends all
messages. (default)
Control long space disconnect
ATY0
Disables long space disconnect. (default)
ATY1
Enables long space connect.
Soft reset and restore profile
ATZ0
Restores stored profile 0. (default)
ATZ1
Restores stored profile 1.
Escape Characters
+++
The escape characters are known as +++. They will
switch from on-line mode to command mode while
preserving the connection with the on line modem.
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Extended AT Commands
Command
Description
Data carrier detect (DCD) signal
AT&C0
Forces DCD signal to be on at all times. (default)
AT&C1
DCD on indicates presence of data carrier.
Data terminal ready (DTR) signal. Interprets the ON to OFF
transition of the DTR signal from the DTE according to the &Q
settings.
AT&D0
AT&D1
AT&D2
AT&D3
AT&F
&Q0,5,6. DTR ignored.
&Q1,4. Modem hangs up; auto answer not affected.
&Q2,3. Modem hangs up; auto answer inhibited.
(default)
&Q0,1,4-6. Asynchronous escape sequence.
&Q2,3. Modem hangs up; auto answer inhibited.
&Q0-6. Modem hangs up; auto answer inhibited.
&Q0,1,4-6. Modem does a soft reset as if the ATZ
command were received;
&Q2,3. Modem hangs up; auto answer inhibited.
Recalls factory defaults. Instructs the modem to use
the factory set parameters.
DTE/Modem flow control
AT&K0
Disable flow control.
AT&K3
Enable RTS/CTS (default for data mode)
AT&K4
Enable XON/XOFF.
AT&K5
Enable transparent XON/XOFF.
AT&K6
Enable both RTS/CTS and XON/XOFF
(default for FAX mode)
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Note on Flow Control. XON/XOFF is a software-based flow control
method, using standard ASCII control characters to pause or resume
data transmission. RTS/CTS pacing, a hardware-based method, uses
an electrical signal. Signals are exchanged as follows:
RECEIVER
CTS ON
CTS ON
CTS OFF
Command
è
ç
è
TRANSMITTER
START SENDING
RTS ON (ready to send)
RTS OFF (stop sending)
Description
Select pulse dial make/break ratio
AT&P0
Selects a make/break ratio of 39/61 at 10pps.
US and Canada. (default)
AT&P1
Selects a make/break ratio of 33/67 at 10pps.
UK and Hong Kong.
AT&P2
Same as 0 except at 20pps.
AT&P3
Same as 1 except at 20pps.
Asynchronous mode
AT&Q0
Direct Asynchronous mode.
AT&Q5
Modem negotiates an error-corrected link.
(default)
AT&Q6
Selects asynchronous operation in normal mode
(i.e. speed buffering).
RTS/CTS (Request to Send/Clear to Send)
AT&R0
Not supported.
AT&R1
CTS will drop if required by flow control (default).
Data Set Ready (DSR) signal
AT&S0
Causes DSR signal to be active at all times.
(default)
AT&S1
Causes DSR signal to be active according to the
CCITT specification.
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Command
Description
Test and diagnostics
AT&T0
Terminates any test in progress.
AT&T1
Executes the local analog loopback test.
AT&T3
Executes the local digital loopback test.
AT&T4
Enables the modem to accept a request from a
remote modem for a digital loopback test.
(default)
AT&T5
Instructs the modem to deny a request from a
remote modem for a digital loopback test.
AT&T6
Executes the remote digital loopback test.
AT&T7
Executes the remote digital loopback test with a self
test.
AT&T8
Executes the remote analog loopback test with a
self test.
View Configuration
AT&V
View current configuration and user profile.
Store user profile. Saves the current configuration into nonvolatile RAM as one of two user profiles.
AT&W0
Saves as user profile 0.
AT&W1
Saves as user profile 1.
Designate default user profile
AT&Y0
Selects user profile 0.
AT&Y1
Selects user profile 1.
Stored phone number
AT&Z0= Stores a 45 digit dial string.
AT&Z1= Stores a 45 digit dial string.
AT&Z2= Stores a 45 digit dial string.
AT&Z3= Stores a 45 digit dial string.
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MNP Operation
The HOME/OFFICE MODEM supports all of the preceding classes.
The following AT Commands apply to the MNP protocol.
Default values are highlighted.
Maximum MNP Block Size. Use this command to transmit
smaller blocks of data in a reliable data link connection.
AT\A0
AT\A1
AT\A2
AT\A3
set maximum block size to 64 characters.
set maximum block size to 128 characters.
(DEFAULT)
set maximum block size to 192 characters.
set maximum block size to 256 characters.
Transmit Break. When this command is entered during a nonMNP connection, a break signal is sent to the remote modem.
The length of the break is 100 times the n parameter (1-9) in
milliseconds. The default is 3.
AT\B3
(DEFAULT)
Modem to Modem Flow Control. Enables or disables modem
to modem flow control during a normal mode connection. This
command is ignored when error correction is selected.
AT\G0
AT\G1
Disables flow control (XON/XOFF) (DEFAULT)
Enables flow control (XON/XOFF)
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Break Control. Determines the modem response when a
BREAK is received from the DTE or the remote modem. The
values of the parameters vary based on the three following
conditions:
(1) When a break is received from the DTE during NORMAL or
MNP mode:
AT\K0, 2, 4 modem enters command mode without sending
a break to the remote modem.
AT\K1
modem clears the terminal and modem buffers
and sends a break to the remote modem.
AT\K3
modem does not clear the buffers, but sends a
break to the remote modem.
AT\K5
modem sends a break to the remote modem in
sequence with any transmitted data. (DEFAULT)
(2) When a break is received from the remote modem during
NORMAL mode:
AT\K0, 1
AT\K2, 3
AT\K4, 5
modem clears the terminal and modem buffers
and sends a break to the local DTE.
modem does not clear the buffers but sends a break
to the local DTE.
modem sends a break in sequence with any data
being buffered. (DEFAULT)
(3) When a break is received from the DTE during DIRECT
MODE mode:
AT\K0,1,3 modem sends a break to the remote modem and
enters command mode.
AT\K2, 4, 5 modem sends a break to the remote modem.
(DEFAULT)
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Error Correction Operating Mode. Selects the operating mode
the modem uses while connected.
AT\N0
AT\N1
AT\N2
AT\N3
AT\N4
AT\N5
NORMAL (speed buffering) mode.
DIRECT (pass-through) mode.
RELIABLE LINK mode. Specifies error correction
for the modem-to-modem connection
AUTO-RELIABLE LINK mode. Attempts errorcorrection connection but will fall back to normal
mode if unable to establish an MNP link.
(default)
LAPM error correction mode.
MNP error correction mode
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AT Commands for V.42/V.42bis
The following AT commands apply to the V.42/V.42bis
protocol:
Compression Control. Determines whether or not modem will
use data compression.
AT%C0
AT%C1
AT%C2
AT%C3
disables data compression
enables MNP5 data compression negotiation
enables V42bis data compression
enables both V.42bis and MNP5 data compression
(DEFAULT)
Auto-retrain. Determines whether or not the modem
automatically monitors the line quality and requests a retrain
when necessary.
AT%E0
AT%E1
AT%E2
disables line quality monitor auto-retrain
enables line quality monitor auto-retrain
enables line quality monitor auto retrain and auto
fall back/forward. (DEFAULT)
Report Received Signal Level.
AT%L
009 = -9 dBm, 010 = -10dBm, etc. all the way to 043
(-43 dBm)
Line signal and noise are determined by the unit of
measurement dBm (decibel referenced to one milliwatt). To
arrive at a signal/noise ratio, the noise level is subtracted from
signal level in dBm.
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AT%Q
009 = -9 dBm, 010 = -10dBm, etc. all the way to 043
(-43 dBm)
Report Line Signal Quality. Returns a “high-order” byte of the
calculated EQM (“eye quality monitor”). This can range from 0
to 255. When the value is 8 or greater, the modem will
automatically retrain if enabled by the AT%E1 command. The
value for a normal connection ranges from 0 to 2 and
approaches 8 for a progressively poorer connection. Returns an
OK result code.
000 to 007 no retrain
008 to 255 retrain performed if enabled by %E1.
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AT+MS Command (Modulation Select)
This extended format command selects the modulation,
optionally enables or disables automode, and optionally
specifies the lowest and highest connection rates using from
one to four subparameters. The command format is:
+MS=<mod>[,[<automode>][,[<min_rate>][,[<max_rate>]]]]
The default value as reported by the +MS? command is:
+MS=11,1,300,28800
Note 1: For 14400bps and lower speeds, the Nn command and S37
register can alternatively be used, in which case the +MS
subparameters will be modified to reflect the Nn command and
S37=x settings. Use of the Nn and S37=x commands is not
recommended, but is provided for compatibility with existing
communication software. (S37 is not updated by the +MS command).
Note 2: Subparameters not entered (enter a comma only or <CR> to
skip the last subparameter) remain at their current values.
Reporting Selected Options
The modem can send a string of information to the DTE
consisting of selected options: +MS?
The response is:
+MS:<mod>,<automode>,<min_rate>,<max_rate>
Example: +MS: 11, 1, 300, 28800 (shows default values)
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Reporting Supported Options
The modem can send a string of information to the DTE
consisting of supported options using the following commands.
+MS=?
The response is:
+MS: (list of supported <mod> values), (list of supported
<automode> values), (list of supported <min_rate> values), list
of supported <max> rate values)
Example:
+MS: (0, 1, 2, 3, 9, 10, 11, 64, 69, 74), (0,1) (300-28800), (30028800)
Subparameter Definitions
1. <mod> = a decimal number which specifies the preferred
modulation (automode enabled) or the modulation
(automode disabled) to use in originating or answering a
connection. The options are as shown on the following page:
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Modulation
<mod> Selected
0
1
2
3
9
10
11
V.21
V.22
V.22bis
V.23
V.32
V.32bis
V.34
64
69
74
Bell 103
Bell 212
V.FC
Possible rates (bps)
300
1200
2400 or 1200
1200*
9600 or 4800
14400, 12000, 9600, 7200, or 4800
33600, 28800, 26400, 24000,
21600, 19200, 16800, 14400,
12000, 9600, 7200, 4800, or 2400
(DEFAULT)
300
1200
28800, 26400, 24000, 21600,
19200, 16800, 14400
* For V.23, originating modes transmit at 75bps and receive at 1200bps;
answering modes transmit at 1200bps and receive at 75bps. The rate is always
specified at 1200bps.
The modem may also automatically switch to another
modulation (automode), subject to the following constraints:
n
The modem may not be able to automatically switch from
the current modulation (specified by <mod>) to some other
modulation. For example, there is no standard way to
automode from Bell 103 to V.23.
n
The DTE may disable automode operation (see <automode>).
n
The DTE may constrain the range of modulations available
by specifying the lowest and highest rates (see <min_rate>
and <max_rate> below).
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2. <automode>=an optional numeric value which enables or
disables automatic modulation negotiation. Options are:
<automode>
0
1
Option Selected
Automode disabled
Automode enabled
The default value is 1, which enables automode. Note,
however, there are modulations for which there is no automatic
negotiation (e.g., Bell 212 (<mod>=69).
For <automode> = 0 (automode disabled, i.e., fixed
modulation):
a. If <max_rate> is within the rates supported by the selected
modulation, the selected rate is that specified by <max_rate>.
Example: +MS=9,0,1200,4800 selects V.32 4800bps fixed rate.
b. If <max_rate> is greater than the highest speed supported by
the modulation specified by <mod>, the starting rate is the
highest rate supported by the selected modulation.
Example: +MS=9,0,2400,14400 selects V.32 9600 or 4800bps.
c. To emulate N0S37=x command sequence to select fixed mode
operation, specify the <max_rate> and <min_rate> both to be
the same requested speed, and <mod> to be the modulation
for that speed.
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Example:
+MS=11,0,16800,16800 selects V.34 16800bps fixed
mode (no comparable S37 command).
+MS=10,0,12000,12000 selects V.32bis 12000bps
fixed mode (same as N0S37=10).
For <automode> = 1 (automode enabled; i.e., automatically
selected speed and modulation).
a. If <max_rate> is greater than the highest rate supported by
the modulation specified by <mod>, the modem automodes
down from the highest rate of selected modulation.
Example:
+MS=10,1,1200,24000 selects automoding down
from V.32bis 14400bps.
b. To emulate N1S37=x sequence command, specify the
modulation and the rate to start automoding down from
using <mod> and <max_rate>, respectively. Set <min_rate>
to 300 to allow automoding all the way down to V.21 300bps.
Example:
+MS=11,1,300,16800 selects automode starting at
V.34 16800bps (no comparable S37 command)
+MS=10,1,300,12000 selects automode starting at
V.32bis 12000bps (same as N1S37=10).
3. <min_rate>= is an optional number which specifies the
lowest rate at which the modem may establish a connection.
The value is decimal-coded in units of bps, e.g., 2400
specifies the lowest rate to be 2400bps. The default is 300 for
300 bps.
4. <max_rate>= is an optional number which specifies the
highest rate at which the modem may establish a connection.
The value is decimal-coded in units of bps, e.g., 14400
specifies the highest rate to be 14400bps. The default is 28800
for 28800bps.
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S-Registers
This section defines the purpose of the modem registers, and
sequentially lists the registers and describes their functions.
These registers affect various operating characteristics and
allow you to obtain information about the modem, as well as
test the modem. Each register has a factory-set value, which
you can read or change to fit your needs.
Reading a Register Value
To read the current value of a register, type:
AT Sn? [ENTER],
where n is a register number.
AT Sn? Sn? [ENTER] from the command mode.
To read the register values of S0 and S1, type
AT S0? S1? [ENTER].
The modem will display the first register value, a carriage
return, the next register value, a carriage return, and OK or 0.
Changing a Register Value
To change a register value, use the Sn command (ATSn=v),
where n is a register number and v is the new value you want
to assign to the register. Type:
AT S0=3 [ENTER]
to have the modem automatically answer on the third ring.
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The following table lists the modem’s registers and their
functions.
Reg.
S0
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
Range
0-255
0-255
0-255
0-127
0-127
0-255
2-255
1-255
0-255
1-255
1-255
Units Default
rings
0*
rings
0
rings
43
ASCII
13
ASCII
10
ASCII
8
seconds
2
seconds
50
seconds
2
seconds
6/10
seconds
14 (1.4)
Definition
Auto-answer
Count incoming rings
Escape character value.
Carriage return character.
Line feed character.
Backspace character.
Wait time for Blind Dialing.
Wait for carrier after dial.
Pause time for dial delay.
Carrier detect.
Lost Carrier to Hang Up
Delay.
S11
50-255
95/100 DTMF tone duration
(* in one-hundredth second increments)
S12
0-255 seconds
50(1) Escape code guard time*.
(*in one-fiftieth second increments)
S13
Reserved.
S14
Bit Mapped
138(8Ah) Bit mapped registers.
S15
Reserved
S16
Bit Mapped
0
Modem test options.
S17
Reserved.
S18
0-255 seconds
0
Test timer.
S19
Reserved.
S20
Reserved.
S21
Bit Mapped
4(04h)
Bit mapped registers.
S22
Bit Mapped
117(75h)
Bit mapped registers.
S23
Bit Mapped
54(36h)
Bit mapped registers.
* For New Zealand, value must be between 2 and 5.
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Reg.
S24
S25
S26
S27
S28
S29
S30
S31
S32
S33
S34-35
S36
S37
Range Units Default
Definition
0-255 seconds
0
Sleep Inactivity Timer.
0-255 seconds
5
Asynchronous DTR Delay.
0-255 seconds
1
RTS to CTS Delay Interval.
Bit Mapped
9(09h) Bit mapped registers.
Bit Mapped
0
Bit mapped registers
0-255 ms
10
Flash Dial Modifier Time.
0-255 seconds
0
Disconnect Inactivity Timer.
Bit Mapped
2
0-255 ASCII
17(11h) XON Character.
0-255 ASCII
19(19h) XOFF Character.
Reserved.
7
LAPM Failure Control
0
Line Connection speed
NOTE: Desired sub-V.34 line connection speed. If an invalid number
is entered, the number is accepted into the register, but S37 will react
as though the default value has been entered. See the +MS command
for more modulation selections.
Bits 0-4:
0=
1-3
4
5
6
7
8
9
10
11
12
=
=
=
=
=
=
=
=
=
=
Attempt auto mode connection (DEFAULT)
Attempt to connect at 300bps
Reserved
Attempt to connect at V.22 1200bps
Attempt to connect at V.22bis 2400bps
Attempt to connect at V.23
Attempt to connect at V.32/V.32bis 4800bps
Attempt to connect at V.32/V.32bis 9600bps
Attempt to connect at V.32bis 12Kbps
Attempt to connect at V.32bis14.4Kbps
Attempt to connect at V.32bis 7200bps (ATF7)
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Reg.
S38
Range Units Default
0-255 seconds
20
S39
S40
S41
S42-45
S46
Bit Mapped
Bit Mapped
Bit Mapped
3
104(68h)
3
136 or 138
138
Definition
Delay Before Forced
Hangup.
Bit Mapped Registers.
Bit Mapped Registers.
Bit Mapped Registers.
Reserved.
Data Compression Control.
NOTE: 136 enables error correction with no compression; 138 enables
error correction WITH compression.
S48
0, 7, 128
7
V.42 Negotiation.
NOTE: 0 disables negotiation and proceeds with LAPM; 7 enables
negotiation; and 128 disables negotiation and proceeds with fallback
action specified in S36. The default for S36 is to attempt an MNP
connection.
S49-81
S82
3, 7, 128
S86
0-255
S91
S92
128(40h)
NA
0 to -15 dBm
0 to -15 dBm
10
10
Reserved.
Break Handling Option.
Connection Failure Cause
Code.
PSTN Transmit Level.
Fax Transmit Level.
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Reg.
Range Units
S95
Bit-Mapped
Default
0
Definition
Extended Results Codes.
NOTE: Bit values are defined as follows for S95:
0 = CONNECT CODE indicates DCE speed instead of DTE
speed.
1 = Append ARQ (automatic repeat request) to verbose
CONNECT XXXX result code if protocol is other than
none.
2 = Enable CARRIER XXXX result code.
3 = Enable PROTOCOL XXXX result code.
5 = Enable COMPRESSION result code.
Bits 4, 6, and 7 are reserved.
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Result Codes
Result
Code
Numeric
Value
Description
OK
0
Modem successfully executed a command line.
CONNECT
1
Connection made at 300 bps.
RING
2
Modem detected an incoming call.
NO CARRIER 3
Modem lost or could not detect a remote
carrier signal within the Register S7 time.
ERROR
4
Modem found an error in the command line.
CONNECT
1200
5
Modem established a connection 1200 at
1200bps.
NO
DIALTONE
6
Modem did not detect a dial tone within 5
seconds after going off-hook.
BUSY
7
Modem detected a busy signal.
NO ANSWER 8
Five seconds of silence was not detected
when using the @ command in the dial
command line.
CONNECT
0600
9
Modem established a connection at 600 bps.
CONNECT
2400
10 Modem established a connection at 2400 bps.
CONNECT
4800
11 Modem established a connection at 4800
bps.
CONNECT
9600
12 Connection made at 9600 bps.
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Result
Code
Numeric
Value
Description
CONNECT
7200
13 Connected as data modem during an
answer.
CONNECT
12000
14 Connection made at 12000 bps.
CONNECT
14400
15 Connection made at 14400 bps.
CONNECT
19200
16 Connection made at 19200 bps.
CONNECT
38400
17 Connection made at 38400 bps.
CONNECT
57600
18 Connection made at 57600 bps.
CONNECT
115200
19 Connection made at 115,200 bps.
CONNECT
22 Modem returns this result code when upon
75TX/1200RX
establishing a V.23 originate connection
when the modem has been instructed to
report the DTE speed to the DTE upon
connecting.
CONNECT
23 Modem returns this result code when upon
1200RX/75RX
establishing a V.23 answer connection
when the modem has been instructed to
report the DTE speed to the DTE upon
connecting.
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Result
Code
DELAYED
Numeric
Value
Description
24 For X4; when a call fails to connect and the
number dialed is ‘delayed’ due to country
blacklisting requirements.
BLACKLISTED 32
For X4; when a call fails to connect and the
number dialed is considered ‘blacklisted’.
FAX
33
A fax modem connection is established.
DATA
35
A data modem connection is established.
CARRIER
300
40 Carrier rate of 300 bps.
CARRIER
1200/75
44 V.23 backward channel has been detected.
CARRIER
75/1200
45 V.23 forward channel has been detected
CARRIER
1200
46 Carrier rate of 1200 bps.
CARRIER
2400
47 Carrier rate of 2400 bps.
CARRIER
4800
48 Carrier rate of 4800 bps.
CARRIER
7200
49 Carrier rate of 7200 bps.
CARRIER
9600
50 Carrier rate of 9600 bps.
Modem Command Reference
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Result
Code
Numeric
Value
Description
CARRIER
12000
51 Carrier rate of 12000 bps.
CARRIER
14000
52 Carrier rate of 14400 bps.
CARRIER
16800
53 Carrier rate of 16800 bps.
CARRIER
19200
54 Carrier rate of 19200 bps.
CARRIER
21600
55
Carrier rate of 21600 bps
CARRIER
24000
56
Carrier rate of 24000 bps
CARRIER
26400
57
Carrier rate of 26400 bps.
CARRIER
28800
58
Carrier rate of 28800 bps.
COMPRESSION: 66
CLASS 5
The modem has connected in MNP class 5
and COMPRESSION message reporting has
been enabled.
COMPRESSION 67 The modem has connected in V.42bis and
V.42bis
COMPRESSION message reporting has been
enabled.
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Result
Code
Numeric
Value
Description
COMPRESSION: 69
NONE
The modem has connected without data
compression and COMPRESSION message
reporting has been enabled.
PROTOCOL:
NONE*
76
Modem has connected without any form of
error connection.
PROTOCOL:
LAPM*
77
Modem has connected in the V.42 LAPM
mode of error correction.
PROTOCOL:
ALT*
80
Modem has connected in the MNP mode of
error correction.
PROTOCOL:
81
ALT* CELLULAR
Modem has connected in the MNP10 mode.
* PROTOCOL message reporting has been enabled.
+FCERROR
+F4 Fax carrier error.
Modem Command Reference
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Appendix D: Servicing Your Boca Product
If your HOME/OFFICE MODEM requires service, first contact the
authorized dealer from whom you purchased the modem. If the
dealer is unable to assist you, and you must contact Boca
Research, Inc., please follow the instructions below.
Our electronic BBS is available 24 hours a day at (561) 241-1601
and will support data transmission speeds up to 28.8Kbps with
settings of N, 8, 1. Once your modem is functional, the BBS
may be helpful (especially during off hours) if you have a
question about product settings, or if you wish to download
special software or utilities.
If the Troubleshooting section (Section Five) did not resolve
your problem, you may call our technical support staff for
assistance. If you haven’t referred to the Troubleshooting
section, do so now.
NOTE: CALLING TECHNICAL SUPPORT WITHOUT
COMPLETE AND ACCURATE INFORMATION
CONCERNING YOUR PROBLEM MAY BE BOTH TIMECONSUMING AND FRUSTRATING FOR YOU.
1. When calling Boca Research Technical Support, have the
following information available:
n
n
n
n
n
Board or external unit name and part number
Computer manufacturer
Computer Model
Peripherals in system
Operating system and version
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If you suspect a problem with a specific program or
software package, make note of the name, version or
release number, and manufacturer of the software.
2. Call our Technical Support Department between the hours of
8:00 a.m. and 6:30 p.m. EST Monday through Friday at (561)
241-8088. A technician will be available to discuss the
problem(s) you are experiencing.
If factory service is required, you will be given a Return
Merchandise Authorization (RMA) number. Please place
this number on the outside of the package when you return
the item(s) for service and reference it on any
correspondence included in the package. Boca Research,
Inc. will return any product which is not accompanied by
an RMA number.
3. Refer to the Warranty Statement if the product is covered
under the five-year Boca Research, Inc. Limited Warranty.
4. Certain parts will not be covered under the Boca Research,
Inc. Limited Warranty. Dealer installed parts are warranted
by the dealer. Parts which you have installed yourself are
covered only by the supplier ’s warranties. In these cases,
Boca Research, Inc. can identify which parts are defective,
but will not replace such parts until specific written
authorization is received from you. The cost of parts and
labor involved in making such repairs will be billed to you
C.O.D.
5. When sending the HOME/OFFICE MODEM to Boca Research, Inc.
for repairs, please be sure to include:
Servicing Your Boca Product
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n
n
n
n
n
the HOME/OFFICE MODEM (board or external case only)
a copy of the original invoice
your return street address (for UPS purposes)
phone number
the RMA number mentioned above
Package the product securely in a container equivalent to the
original packaging, and insure the package to protect against
loss or damage during transit. Shipping charges must be
prepaid; C.O.D. shipments will not be accepted. Please use the
address below for all correspondence:
Boca Research, Inc.
RMA Department - RMA # _____________
1601 Clint Moore Road
Boca Raton, FL 33487-2841
6. If the repairs performed on your modem were covered by the
warranty, Boca Research, Inc. will return it prepaid via UPS.
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Appendix E: Warranty Information
Limited Warranty
Boca Research, Inc. (BRI) warrants to the original buyer of this BRI product that the
hardware is free of defects in materials and workmanship for a period of five (5) years
from the date of purchase from BRI or its authorized dealer. Should the product fail to be in
good working order at any time during the five-year period, BRI, will at its option, repair
or replace this product as described below. This warranty does not cover defects resulting
from misuse, abuse, negligence, accident, repairs, or alterations made by either the
customer or another party. Boca Research reserves full rights to determine whether a
defective product falls into this category.
The entire risk as to the quality and performance of the product rests with the customer.
Any written or oral information or advice given by Boca Research dealers, distributors,
agents, or employees will in no way increase the scope of this warranty. This warranty
applies only to the product described in this manual and not to any other value-added
software which may be included.
All products will be serviced and returned via UPS-ground at no charge to customers.
All customers are required to demonstrate proof of purchase when requesting a Return
Merchandise Authorization (RMA). The period of service commences on the date of
purchase. A copy of the sales slip must be included with the returned merchandise.
Products which require Limited Warranty service during the warranty period should be
delivered to BRI at the address in the Appendix (Servicing Your Boca Product) with proof
of purchase and the Return Merchandise Authorization (RMA) number provided by BRI
Technical Support. Refer to the Appendix in your manual. Replacement parts or complete
products will be furnished on an exchange basis only. Replaced parts and/or products
become the property of BRI.
If the returned product is sent by mail, the purchaser agrees to prepay shipping charges,
insure the product or assume the risk of loss or damage which may occur in transit, and to
use a shipping container equivalent to the original packaging. ALL EXPRESS AND
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS OF PURPOSE FOR
THE PRODUCT ARE LIMITED IN DURATION TO THE ABOVE FIVE- AND ONE-YEAR
PERIODS, RESPECTIVELY.
UNDER NO CIRCUMSTANCES (WHETHER BASED IN CONTRACT OR TORT) SHALL
BOCA RESEARCH BE LIABLE FOR INCIDENTAL, CONSEQUENTIAL, INDIRECT,
SPECIAL, OR PUNITIVE DAMAGES OF ANY KIND, OR FOR LOSS OF REVENUE, LOSS
OF BUSINESS, OR OTHER FINANCIAL LOSS AS A RESULT OF THE SALE,
INSTALLATION, MAINTENANCE, USE, PERFORMANCE, FAILURE, OR DISRUPTION
OF ITS PRODUCTS.
Boca Research reserves the right to make periodic changes or enhancements to any Boca
Research product without prior notification, but has no obligation to modify or update
products once sold.
This warranty gives you specific legal rights, and you have other rights which may vary
from state to state. This warranty is valid only in the United States.
Modem Command Reference
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Glossary
A
algorithm. A formula or procedure which employs various methods
defining how data is to be used to give a prescribed result.
analog signals. Signals which can vary over a continuous range (e.g.,
the human voice over conventional telephone lines). Analog circuitry
is more subject to distortion and noise, but it is more capable of
handling complex signals than are digital signals which can have only
discrete values.
ARQ. Automatic Retry ReQuest for retransmission. A type of
communications link where the receiver asks the transmitter to resend a block of data when errors are detected.
ANSI. American National Standards Institute. A non-profit, private
industry association which governs most USA-standards setting
agencies.
ASCII. Acronym for American Standard Code for Information
Interchange. ASCII is an ANSI character set. The standard ASCII
character set consists of 128 decimal numbers (0-127) for letters of the
alphabet, numerals, punctuation marks, and common special
characters. The extended ASCII character set extends to 255 characters
and contains special mathematical, graphics, and foreign characters.
asynchronous communications. A method of transmission in which
one character is sent one bit at a time; also referred to as serial
transmission.
automode. Capability to automatically select the highest possible line
speed. Factors for highest possible line speed include: ITU-TSS
compliance, common capabilities of both modems and telephone line
quality.
B
Bell standards. Refers to the U. S. modulation protocol standards
developed by the former AT&T Bell Systems such as Bell 103 (300bps
transmission) and Bell 212A (1200bps transmission).
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bit-mapped registers. An S-register which contains multiple bitoriented values. Example: the value of S22 is the sum of the bit values
which you select (bits 0-1: speaker volume/value: 0-3; bits 2-3:
speaker control/value: 0-3; bits 4-6: limit result codes/value: 0, 4-6, 7).
blind dialing. An automated process whereby the modem goes offhook and dials without waiting for a dial tone. This is prohibited in
many countries.
block transfer control. Determines whether or not the modem uses
block or stream mode during an MNP connection. In stream mode,
MNP sends data frames in varying length. Block mode sends fixed
data frames of 256 characters and is selected with the MNP-based \L
command.
bps. bits per second.
break handling. Determines how the modem responds when a
BREAK signal is received from either the DTE (Data Terminal
Equipment or computer/terminal) or the remote modem. This is
controlled by the MNP-based AT extended command \K. A break
signal is represented on the communications line by a steady space
signal for a significant length of time. Break signals may be activated
from the keyboard by pressing the BREAK key or the control (CTRL)
and C keys.
C
CCITT. Consultative Committee for International Telephone and
Telegraph. This advisory organization is part of the ITU (International
Telecommunication Union) which is an agency of the United Nations.
Organization recently renamed International Telecommunications
Union-Telecommunications Standards Sector (ITU-TSS)
command mode. The modem is in command mode when it is turned
on or reset, when it loses its connection to a remote modem, when it
is in on-line mode, or when escape characters (+++) are typed. To
transmit data, the modem must be in data mode. The modem does
not transmit data when in command mode.
communications protocol. A set of procedures which controls how a
data communications network operates.
D
DCD. Data Carrier Detect. Indicates to the terminal device that the
modem is receiving a valid carrier signal from a remote modem. The
carrier is a tone at a specified frequency.
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DCE. Data Communications Equipment. The local and/or remote
modem. A DCE is usually connected to a DTE.
DTE. Data Terminal Equipment. The computer or terminal, either
local (yours), or the remote (the one you’re communicating with). A
DTE is usually connected to a DCE.
DTR. Data Terminal Ready. The computer issues this signal to the
attached modem indicating that it is ready to receive data.
data compression. A technique that examines transmitted data for
redundancy and replaces strings (groups) of characters with special
codes which the receiving modem interprets and restores to its
original form. Transmission of compressed data results in shorter
connect times and hence cost savings for connect charges. Data
compression is sometimes called “source encoding”.
data mode. The modem is in data mode when a connection has been
established with a remote modem and sends a CONNECT response
confirming the connection. User data may then be transmitted or
received.
dial modifier. Dial modifiers are special characters appended to the
ATD command which instruct the modem how to place a call.
digital signal. A discrete signal which can only take on one of several
(usually only two) discrete levels in contrast to analog signals which
can take a continuous range of levels.
E
error detection and correction. The transmitting modem attaches a
special pattern (called a frame check sequence) calculated according
to a prescribed algorithm from user-defined data to the end of a block
of data. The receiving modem performs the same algorithm and
compares it to the one with the transmitted data. If these match, then
the block of data has been received correctly. If not, the block of data
is re-transmitted until no errors are detected.
escape sequence. Also referred to as the escape command. This
special command is entered as three plus symbols (+++) and places
the modem in command mode and interrupts user data transmission,
but does not terminate the data connection. This allows the entering
of commands while the connection is maintained.
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extended AT-command. Extended commands were developed to
provide greater functionality and control over modem operations
than is available from the basic AT command set.
F
fax mode. The modem is in fax mode when, through use of fax
communications software, it can send and receive faxes, print and
display fax files, convert files to fax-files, and set certain fax-related
features. Note: the modulation protocol used by the modem in fax
mode is also different from the usual data mode modulation.
flow control. Compensates for the difference between the rate at
which data reaches a device and the rate at which the device
processes and transmits. This is controlled by the extended AT
command &K. The two common types of flow control are RTS/CTS
signaling (a hardware based method, employing an electrical signal)
and XON/XOFF (a software-based method using standard ASCII
control characters to pause or resume transmission).
full-duplex. Two-way simultaneous transmission between modems,
which may occur via a four-wire circuit on a leased line, or with a
two-wire connection when the frequency bandwidth is divided into
two distinct channels, or when echo cancellation is employed (e.g.,
Bell 103, 212, and V.22 use frequency division, while V.32 uses echo
cancellation).
G
guard tone. Guard tones are used in the United Kingdom and other
countries. This requires that the modem transmit an 1800-Hz tone
after it sends an answer tone. The guard tone is controlled by the &G
command. Guard tones are not used in the U.S.A.
H
half-duplex. Signal flow in both directions, but only one way at a
time with each modem alternating between send and receive.
Hayes-compatible. Hayes Microcomputer Products, Inc. developed
the AT command set which has become a de facto industry standard.
Hayes commands are always initiated with an AT (attention code)
prefix.
hook flash. The dial modifier “!” causes the modem to go on-hook
(hang-up) for one-half second. Also controlled by the ATH command.
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L
LAPM. Link Access Protocol Modem. A V.42 ARQ type of error
correction protocol which is controlled by S-Register 46, where LAPM
may be activated with or without V.42bis data compression.
leased line. Also referred to as a private line. A leased line is obtained
from a communications company (carrier) to provide a transmission
medium between two points. The line consists of a permanent
dedicated circuit between two points, or to set of previously arranged
points. The cost of the line is usually based on the distance between
locations. This is in contrast to switched or dial-up lines, which can be
connected to any point on the network.
line modulation. The means by which a carrier is varied to represent
a signal carrying information. In a modem, the user ’s digital data is
used to modulate the modem’s transmitter ’s carrier or carrier to
allow the digital signal to be carried over analog facilities.
long space disconnect. Determines whether or not modem
disconnects when it receives a continuous break from a remote
modem. Controlled by the ATY command.
loopback tests. There are four types of loopback tests which are as
follows: (1) the local digital loopback tests the operation of the DTE,
including whether or not data is leaving the terminal or computer
port; (2) the local analog loopback tests the digital and analog circuits
of the modem; (3) the remote digital loopback checks the operating
condition of the line and remote modem; (4) the remote analog
loopback tests the line to the remote modem.
M
MNP. Microcom Networking Protocol. A series of data
communications protocols developed by Microcom for full-duplex,
error-free communications.
make/break ratio. The &P command controls the ratio of the off-hook
(make) to on-hook (break) interval used by the modem when it pulse
dials. &P0 selects a 39%/61% make/break ratio for use in the U.S.
&P1 selects a 33%/67% make/break ratio for use in the United
Kingdom and Hong Kong. The &P command is NOT allowed in
some countries.
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modulation handshake. Also referred to as Automode Enable and is
controlled by the ATN command. This determines whether or not the
modem must connect at a particular speed, or allow connection at
any speed supported by both modems.
N
negotiation fallback. Controlled by S-Register 36 as part of the V.42
protocol. Setting this register indicates what action to take when a
desired connection cannot be made (e.g., hang-up, direct mode
connect, normal mode connect).
non-volatile RAM. Also NVRAM. Random access memory whose
data is retained when power is turned off. This is especially useful for
modems to store user-defined default configuration settings and
frequently used telephone numbers. This information would be
loaded into modem RAM at power-up.
O
on-line state. Same as data mode. To transmit or receive data, the
modem must be in the on-line state. When placing a call, the modem
is put on-line with the dial command.
P
PBX. Private Branch Exchange. A telephone switch at a customer site.
pulse dialing. Also referred to as rotary dialing, i.e., dialing with the
older-style rotary dial wheel. The dial modifier ATP sets the modem
to pulse dialing, which is the default method as opposed to tone
dialing (push-button touch-tone) which is enabled with ATT. All
telephone exchanges will accept older-style pulse dialing and most
exchanges will accept modern tone-dialing. Tone dialing is faster and
more reliable since mechanical relays and their inherent failure
mechanisms are avoided.
R
result code. A response sent by the modem after executing a
command. The response reports the modem’s status or the progress of
a call and can take the form of either digits (numeric) or words
(verbose). Issuing a V1 command enables word responses. A V0 (Vzero) command enables numeric responses. The Q1 command
disables their use entirely. Example: “OK” (word), or 0 (numeric)
indicates that the modem successfully executed a command.
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retrain. An adjustment process performed when one of the modems
detects signal distortion or line noise which threaten data integrity.
RTS/CTS. Request to Send/Clear to Send. RTS and CTS are two
control signal lines between the modem (DCE) and terminal (DTE)
which allow the terminal to control the flow of information. See also
flow control.
S
sleep inactivity timer. Determines the length of time the modem
operates in normal mode with no activity before entering low-power
“sleep” mode.
split-speed direction. Determines which direction (transmit or
receive) has the 75bps channel and which has the 1200bps channel,
but is only active if the \W command is set to 1. Used with V.23
modulation only.
standard AT-command. The basic AT command set, originated by
Hayes Microcomputer Products, Inc.
synchronous clock source. Applies to synchronous modem
operations and is set with the &X command. The command specifies
the clocking source referred to as the transmit signal element timing.
This can be controlled by either the modem or the terminal.
synchronous communications. A method of transmission in which
data bits are sent continuously at the same rate under the control of a
fixed frequency clock signal.
T
touch-tone dialing. Push-button tone dialing as used on
contemporary phone sets. The dial modifier ATT sets the modem to
“tone” mode. Tone dialing is faster and more reliable than older-style
pulse dialing.
X
XON/XOFF. XON and XOFF are the names of two different control
characters. See also flow control.
Acknowledgements
The Complete Modem Reference. Gilbert Held. John Wiley & Sons, Inc.
Upgrading and Repairing PCs. (Second Edition). Que Corporation.
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Manual Part No. 9378
Rev. 1.0
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